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QmlDesigner: Fix compile

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Use:
if constexpr (std::is_floating_point_v<Type> && hasNoFloatStdToChar() {
to prevent instantiation of the std::to_chars branch which avoids
ambiguous overload errors.

Use:
static_cast<std::size_t> to fix narrowing conversion warning

Change-Id: I8058e7b5cf520165bd8e8f449fe87f81ad403cf4
Reviewed-by: Marco Bubke <marco.bubke@qt.io>
This commit is contained in:
Tim Jenssen
2025-03-20 20:45:24 +01:00
committed by Marco Bubke
parent 6fd2efab6b
commit 1acd199665
1 changed files with 21 additions and 20 deletions
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33
src/libs/nanotrace/staticstring.h
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@@ -9,13 +9,6 @@
#include <charconv>
#include <limits>
#if !defined(__cpp_lib_to_chars) || (__cpp_lib_to_chars < 201611L) || \
(defined(__GNUC__) && __GNUC__ < 11) || \
(defined(_MSC_VER) && _MSC_VER < 1930) || \
(defined(__clang_major__) && __clang_major__ < 14)
#define NO_STD_FLOAT_TO_CHARS 1
#endif
namespace NanotraceHR {
template<std::size_t Capacity>
@@ -58,27 +51,35 @@ public:
}
}
static consteval bool hasNoFloatStdToChar()
{
#if !defined(__cpp_lib_to_chars) || (__cpp_lib_to_chars < 201611L) || \
(defined(__GNUC__) && __GNUC__ < 11) || \
(defined(_MSC_VER) && _MSC_VER < 1930) || \
(defined(__clang_major__) && __clang_major__ < 14)
return true;
#else
return false;
#endif
}
template<typename Type, typename std::enable_if_t<std::is_arithmetic_v<Type>, bool> = true>
void append(Type number)
{
#if NO_STD_FLOAT_TO_CHARS
// Fallback using snprintf with sufficient precision.
if constexpr (std::is_floating_point_v<Type>) {
if constexpr (std::is_floating_point_v<Type> && hasNoFloatStdToChar()) {
// Fallback using snprintf for floating point numbers
char buffer[std::numeric_limits<Type>::max_digits10 + 2];
auto size = std::snprintf(buffer, sizeof(buffer), "%.9f", number);
if (size >= 0)
append({buffer, size});
return;
}
#endif
append({buffer, static_cast<std::size_t>(size)});
} else {
// 2 bytes for the sign and because digits10 returns the floor
char buffer[std::numeric_limits<Type>::digits10 + 2];
auto result = std::to_chars(buffer, buffer + sizeof(buffer), number);
auto endOfConversionString = result.ptr;
append({buffer, endOfConversionString});
}
}
void pop_back() { --m_size; }